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Texas Instruments UCC28911 | Demoboard TIDA-010062
1-kW, 80 Plus Titanium, GaN CCM Totem Pole Bridgeless PFC and Half-Bridge LLC Reference Design
Overview
| Topology | Flyback Converter |
| Input voltage | 100-230 V |
| Output 1 | 385 V |
| IC revision | 1 |
Description
This reference design is a digitally controlled, compact 1-kW AC/DC power supply design for server power supply unit (PSU) and telecom rectifier applications. The highly efficient design supports two main power stages, including a front-end continuous conduction mode (CCM) totem-pole bridgeless power factor correction (PFC) stage. The PFC stage features LMG341x GaN FET with integrated driver to provide enhanced efficiency across a wide load range and meet 80 plus titanium requirements. The design also supports a half-bridge LLC isolated DC/DC stage to achieve a +12-V dc output at 1-kW. Two control cards use C2000™ Piccolo™ microcontrollers to control both power stages.
Features
- 80 Plus Titanium efficiency, η=>95% @ 20%-100% load
- CCM GaN based totem pole bridgeless PFC stage with >99% peak efficiency, enabled by LMG341x GaN FET with integrated driver
- Half-bridge Si MOSFET LLC stage with >98% peak efficiency
- Fast load transient, Vo change within 300mV @ 2.5A/us slew rate
- Low iTHD, <10%@10% load, <5% @ 20% load, <2% @ >50% load
- Power density 41W/in3, 38-mm by 66-mm by 160-mm
Typical applications
- Industrial AC-DC
- Merchant telecom rectifiers / Merchant network & server PSU
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Safety Class | dV/dt(V/µs) | DF @ 1 kHz(%) | RISO | Pitch(mm) | Packaging | IRP,40K(A) | ISAT,30%(A) | RDC typ.(mΩ) | fres(MHz) | VOP(V) | Endurance(h) | IRIPPLE(mA) | ILeak(µA) | DF(%) | Ø D(mm) | VIN | VOut1(V) | IOut1(A) | VOut2(V) | IOut2(A) | Vaux(V) | fswitch(kHz) | NPRI : NSEC : NAUX | ISAT(A) | Size | IR(A) | L(mH) | RDC max.(mΩ) | VR(V (AC)) | VT(V (AC)) | Material | L(mm) | W(mm) | H(mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WCAP-FTX2 Film Capacitors, Across the mains, 220 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTX2 Film Capacitors | Capacitance220 nF | Safety ClassX2 | Rate of Voltage Rise180 V/µs | Dissipation Factor0.1 % | Insulation Resistance30 GΩ | Pitch15 mm | PackagingCarton | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | SizePitch 15 mm | – | – | – | Rated Voltage275 V (AC) | – | – | Length18 mm | Width6 mm | Height11.5 mm | MountBoxed THT | ||||
 | WCAP-FTXX Film Capacitors, Across the mains, 470 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTXX Film Capacitors | Capacitance470 nF | Safety ClassX2 | Rate of Voltage Rise220 V/µs | Dissipation Factor0.1 % | Insulation Resistance21.28 GΩ | Pitch15 mm | PackagingCarton | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | SizePitch 15 mm | – | – | – | Rated Voltage310 V (AC) | – | – | Length18 mm | Width8 mm | Height14 mm | MountBoxed THT | ||||
 | WE-CMBNC Common Mode Power Line Choke Nanocrystalline, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CMBNC Common Mode Power Line Choke Nanocrystalline | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | SizeM | Rated Current10 A | Inductance2 mH | DC Resistance6.3 mΩ | Rated Voltage300 V (AC) | Insulation Test Voltage2100 V (AC) | MaterialNanocrystalline | Length24 mm | Width17 mm | Height25 mm | MountTHT | ||||
 | WE-MAPI SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MAPI SMT Power Inductor | – | – | – | – | – | – | – | Performance Rated Current0.9 A | Saturation Current @ 30%1.7 A | DC Resistance733 mΩ | Self Resonant Frequency25 MHz | Operating Voltage80 V | – | – | – | – | – | – | – | – | – | – | – | – | – | Saturation Current1.35 A | Size2510 | Rated Current0.6 A | Inductance0.01 mH | DC Resistance843 mΩ | – | – | – | Length2.5 mm | Width2 mm | Height1 mm | MountSMT | ||||
 | WCAP-ATLL Aluminum Electrolytic Capacitors, –, 3300 µF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-ATLL Aluminum Electrolytic Capacitors | Capacitance3300 µF | – | – | – | – | Pitch5 mm | PackagingAmmopack | – | – | – | – | – | Endurance 7000 | Ripple Current2562 mA | Leakage Current528 µA | Dissipation Factor16 % | Diameter13 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage16 V (AC) | – | – | Length30 mm | – | – | – | ||||
 | WE-OLTI Offline Flyback Transformers, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-OLTI Offline Flyback Transformers | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Input Voltage 269 - 282 V (AC) | Output Voltage 118 V | Output Current 10.1 A | Output Voltage 26 V | Output Current 20.9 A | Auxiliary Voltage12 V | Switching Frequency 110 | Turns Ratio16:2:1:2 | Saturation Current0.3 A | SizeEE16/7/5 | – | Inductance1.6 mH | – | – | Insulation Test Voltage3000 V (AC) | – | Length17.5 mm | Width20 mm | Height14 mm | MountTHT |